Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5977
Number of amino acids:266
Molecular Weight:29450.94 Da
Theoretical pI:5.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.02%
Cysteine CYS (C)10.38%
Glutamic Acid GLU (E)124.51%
Aspartic Acid ASP (D)166.02%
Glycine GLY (G)124.51%
Phynylalanine PHE (F)186.77%
Isoleucine ILE (I)93.38%
Histidine HIS (H)72.63%
Lysine LYS (K)145.26%
Methionine MET (M)51.88%
Leucine LEU (L)2710.15%
Asparagine ASN (N)166.02%
Glutamine GLN (Q)62.26%
Proline PRO (P)93.38%
Serine SER (S)4115.41%
Arginine ARG (R)103.76%
Threonine THR (T)197.14%
Tryptophan TRP (W)20.75%
Valine VAL (V)186.77%
Tyrosine TYR (Y)83.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1310
HydrogenH2026
NitrogenN348
OxygenO413
SulphurS6

FormulaC1310H2026N348O413S6
Total Number of Atoms:4103


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.778,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22920
Absorption 0.1% (=1 g/l)    0.778,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.83, 29.32, 22.56]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:78.4212
Grand average of hydropathicity (GRAVY):-0.24